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SHAREHOLDERS' EQUITY (Tables) | 12 Months Ended
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Dec. 31, 2014
Summary of Stock Option Activity and Related Information | A summary of the Company’s stock option activity and related information is as follows:
|  | Options in thousands |  |  | Weighted average exercise price |  |  | Aggregate intrinsic value |
|  | 2014 |  |  | 2014 |  |  | 2014 |
Outstanding at beginning of year |  |  | 12,602 |  |  | $ | 40.58 |  |  | $ | 301,449 |
Granted |  |  | 2,559 |  |  | $ | 65.28 |  |  |  |  |
Exercised |  |  | (2,173 | ) |  | $ | 26.77 |  |  |  |  |
Forfeited |  |  | (60 | ) |  | $ | 56.46 |  |  |  |  |
Outstanding at December 31, |  |  | *)12,928 |  |  | $ | 47.72 |  |  | $ | 398,893 |
Exercisable at December 31, |  |  | 8,058 |  |  | $ | 41.72 |  |  | $ | 296,900 |
*) | As of December 31, 2014 , approximately 12.8 million options are vested and expected to vest. Options expected to vest reflect an estimated forfeiture rate for purposes of determining related compensation expense.
Summary of Options Outstanding by Exercise Price Range | The options outstanding as of December 31, 2014, have been separated into ranges of exercise price, as follows:
|  | Outstanding |  | Exercisable
Exercise price |  | Number of options (in thousands) |  | Weighted average remaining contractual life (years) |  | Weighted average exercise price |  | Number of options (in thousands) |  | Weighted average remaining contractual life (years) |  | Weighted average exercise price
$ |  |  |  |  |  | $ |  |  |  |  |  | $
21.95-29.49 |  | 3,655 |  | 1.80 |  | 27.30 |  | 3,595 |  | 1.80 |  | 27.31
33.20-47.97 |  | 251 |  | 3.10 |  | 39.27 |  | 172 |  | 2.69 |  | 37.94
49.50-53.67 |  | 5,493 |  | 4.40 |  | 52.06 |  | 3,508 |  | 4.22 |  | 52.38
55.15-74.51 |  | 3,529 |  | 5.79 |  | 62.70 |  | 784 |  | 5.46 |  | 61.01
21.95-74.51 |  | 12,928 |  | 4.02 |  | 47.72 |  | 8,058 |  | 3.23 |  | 41.72
Summary of Restricted Stock Units Award Activity | The following table summarizes information relating to RSUs, as well as changes to such awards during 2014:
|  | Year ended December 31, |
|  | 2014 |
|  | Number in thousands |
Outstanding at beginning of year |  |  | 907 |
Granted |  |  | 298 |
Vested |  |  | (284 | )
Forfeited |  |  | (119 | )
Outstanding as of December 31, |  |  | 802 |
Summary of Performance Stock Units Award Activity | The following table summarizes information relating to PSUs, as well as changes to such awards during 2014:
|  | Year ended December 31, |
|  | 2014 |
|  | Number in thousands |
Outstanding at beginning of year |  |  | — |
Granted |  |  | 103 |
Forfeited |  |  | (9 | )
Outstanding as of December 31, |  |  | 94 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for outstanding performance shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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